A step definition with Cucumber against login for functionnal testing.

login.step.ts

import { Before, Then, When } from '@cucumber/cucumber';

import { TestingModule } from '@nestjs/testing';
import { getTestingModule } from '../../apps/core/src/shared/in-memory-orm.module';
import FixturesService from '../../apps/fixtures/src/fixtures.service';
import { AuthModule } from '../../apps/core/src/authentication/auth.module';
import { AuthService } from '../../apps/core/src/authentication/auth.service';
import { PassportModule } from '@nestjs/passport';
import { JwtModule } from '@nestjs/jwt';
import { PermissionsModule } from '../../apps/core/src/authentication/permissions/permissions.module';

let authService: AuthService = null;

Before(async () => {
  const module: TestingModule = await getTestingModule(
    [FixturesService, AuthService],
    [],
    [
      AuthModule,
      PassportModule,
      JwtModule.register({
        secret: 'secret', // @todo env
        signOptions: { expiresIn: '7d' },
      }),
      PermissionsModule,
    ],
  );

  authService = module.get<AuthService>(AuthService);

  const fixturesService = module.get<FixturesService>(FixturesService);
  await fixturesService.run();
});

When(
  'the user is login in with valid credentials {string} and {string}',
  (email: string, password: string) => {
    return authService.challenge({ email, password }).then((user) => {
      if (user) {
        return 'success';
      }
    });
  },
);

Then('the user should have a valid uuid token', async () => {
  const user = await authService.challenge({
    email: '[email protected]',
    password: 'test1234',
  });

  const token = authService.generateToken(user);

  if (token) {
    return 'success';
  }
});